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package gitpipe
import (
"context"
"gitlab.com/gitlab-org/gitaly/internal/git"
)
// RevisionIterator is an iterator returned by the Revlist function.
type RevisionIterator interface {
ObjectIterator
// Result returns the current item.
Result() RevisionResult
}
// NewRevisionIterator returns a new RevisionIterator for the given items.
func NewRevisionIterator(ctx context.Context, items []RevisionResult) RevisionIterator {
itemChan := make(chan RevisionResult, len(items))
for _, item := range items {
itemChan <- item
}
close(itemChan)
return &revisionIterator{
ctx: ctx,
ch: itemChan,
}
}
type revisionIterator struct {
ctx context.Context
ch <-chan RevisionResult
result RevisionResult
}
func (it *revisionIterator) Next() bool {
if it.result.err != nil {
return false
}
// Prioritize context cancellation errors so that we don't try to fetch results anymore when
// the context is done.
select {
case <-it.ctx.Done():
it.result = RevisionResult{err: it.ctx.Err()}
return false
default:
}
select {
case <-it.ctx.Done():
it.result = RevisionResult{err: it.ctx.Err()}
return false
case result, ok := <-it.ch:
if !ok {
return false
}
it.result = result
if result.err != nil {
return false
}
return true
}
}
func (it *revisionIterator) Err() error {
return it.result.err
}
func (it *revisionIterator) Result() RevisionResult {
return it.result
}
func (it *revisionIterator) ObjectID() git.ObjectID {
return it.result.OID
}
func (it *revisionIterator) ObjectName() []byte {
return it.result.ObjectName
}
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